Phonic apparatus.



S. C. PORTER, BHONIC APPARATUS. APPLICATION FILED NOV. I3. I914.

Patented Oct. 9, 1917.

Inventor: Y

STEPHEN C. PORTER, OF BROOKLYN, NEW YORK.

PHONIG APPARATUS.

Specification of Letters Patent.

Patented Oct. 9, 1917.

Application filed November 13, 1914. Serial No. 871,914.

- a citizen of the United States, residing at I borough of Brooklyn, city of New York, in

the county of Kings and State of New York, have invented certain new and useful Improvements in Phonic Apparatus,"of which the following is a specification,

My invention relates to improvementsin phonic apparatus primarily for use in transmitting the sound waves of phonographic records electrically for 'use in the production of talking moving pictures. The device may also be used asaloud speaking telephone for making announcements in public places. My object is the production of a light, simple, effective apparatus which will faithfully transmit all the sounds and overtones with freedom from blast and foreign noises and reproduce them loudly and naturally.

In the drawing Figure 1 is a view of my complete apparatus;Fig. 2 a sectional view through the apparatus; Fig. 3 a back view of the electrical element with the casing removed; and Fig. 4 a diagram of the wiring employed.

The apparatus consists of a base block 1 having pockets 2 and 3 therein extending therethrough. On the inside or back at 4 the openings merge forming a general resemblance to a figure eight as shown in Fig. 3. Each of these pockets 2 and 3 has a cup 5, 5 of insulation material secured therein. Each cup has a disk of conducting material 6, 6' such as carbon in the bottom thereof, the cup containing carbon granules or balls 7. A common cover or arm 8 of insulating material is pivoted at 9 to the base block! with the conducting disks 10 10' secured to the inner face in contact with the carbon 7. Disks 10 and 10 each have a line wire 1111 leading therefrom. The disks 6, 6' are grounded on the base block and have the line wire 12 in electrical connection therewith.

The base block with its electrical fittings is secured in a case 13 having a perforate cover 14 and an outlet 15.

' In the preferred form an ordinary talking machine reproducer or sound box 16 is secured in theoutlet 15 by a set screw 17 and has the customary diaphragm 18, needle arm 19 and stylus 20.

The needle arm 19 is connected with one end of the arm 8 by a bar 21 of any suitposition.

able, though preferably cushioning, ma- 1 terial and the pressure on the arm 8 is regulated by slipping the sound box 16 in or out of the tube 15 and looking it in proper To balance the pressure of the bar 21 on the arm 8 a spring 22 is secured to the case 1 and bears on the other end of the arm 8 with a piece of rubber or other cushioning material 23 between it and the arm.

The sound box 16 is shown as the preferred form of connection between the electrical mechanism and the record for the reason that a mouth piece or horn 24 may be slipped thereon and verbal announcements made over the circuit but it is obvious that other forms of mechanical connection between the record and electrical device may be employed.

The sound outlet of the sound box, when used, should be free and unrestricted to avoid mufiling of the sound and for the same reason the cover of the outer case is perforated.

In use the apparatus is connected up as shown in Fig. 4. a is the transmitter of Figs. 1, 2 and 3. b is a boost coil having two primary and'one secondary windings. c is a telephone receiver with an amplifying horn. d the battery or other source of electricity and e a variable resistance.

The wires 11, 11 are connected with one end of each primary winding of the boost coil. 12 is connected with both of the opposite ends of the primary windings on the coil through the battery and resistance. 25 and 25 connect the ends of the secondary winding with the receiver.

When the stylus 20 is in contact with a sound record it is apparent that arm 8 will rock in exact accordance with the engraved sound waves compressing and relieving the carbon in the cups and setting up fluctuations in the line wires and in the primary windings of the coil in turn affecting the secondary winding and the receiver thus reproducing the record loudly and naturally. By the use of this appliance it is possible to have the sound record and transmission element at the picture projecting machine with both under the absolute control of a single opera-' tor and to reproduce the sound at the picture screen adding greatly to the illusion.

The operator may listen to the reproduction through the small born 24 and if he desires may make announcements to the audience by talking into the horn 24. In order that the record reproduction may be modulated as to volume the resistance 6 may be utilized enabling a musically inclined operator to properly interpret therecord, Which for technical reasons, is generally recorded at constant Volume.

I claim Phonic apparatus comprising a base block, insulation cups therein, a common cover arm for the cups pivotally secured to the base block, conducting material Within the cups, conducting top and bottom linings in each cup, the top ones being secured to the ends of the arm, electrical conductors cured to the base block and bearing on the opposite end of the arm whereby equilibrium is maintained.

In testimony whereof I have afiixed my signature in presence of two Witnesses.

STEPHEN C. PORTER. Witnesses:

R0121. B. KILLeoRE, MAY M. LEI. 

